I totally fricken love that idea. I had the sane problem, I'm trying to make some kingdom town which actually is modern but could not build the houses, walls, castle, etc. 1 server, that is the current one can be not creative, BUT, Rp builds. There can be a new one which is 100x100 and can be just builds, etc. So, support!!!
Support I love the idea of having bigger plots especially if they are even in size because at the moment all builds can't be even because of the odd size
Support, but I think 120 by 120, and two creative worlds so that people don't lose all of their hard work on their first plot(s).